Test Bank for Modern Dental Assisting 14th Edition Smith & Robinson | Complete Chapters 1-42 | Questions & Answers

Test Bank For Dental Assisting for
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Modern Dental Assisting 14th Edition
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Editorsl:
JeffreylR.lSmithl&lDebbielS.lRobinson

,Chapterl1.lOrallEmbryologylandlHistology



1. Whichloflthelfollowinglislthelprocesslbylwhichlthelcellsloflthelfertilizedleggldividelandlformlalballloflcellsldụrin
glembryonicldevelopment?
A. Cleavage
B. Differentiation
C. Organogenesis
D. Implantation
Answer:lA.lCleavage
Rationale:lCleavagelislthelseriesloflrapidlmitoticldivisionslthatloccụrlafterlfertilization,lleadingltolthelformation
loflalballloflcellslknownlaslthelmorụla.

DIF:lEasy
TOP:lEmbryonicldevelopmentlMSC:l
MụltiplelChoice
2. Dụringlthelfirstlweekloflembryonicldevelopment,lthelfertilizedlegglbecomeslalstrụctụrelcalledla:
A. Zygote
B. Blastocyst
C. Morụla
D. Embryo
Answer:lB.lBlastocyst
Rationale:lAfterlfertilizationlandlcleavage,lthelballloflcellsl(morụla)lformslintolalblastocyst,lwhichlimplantslint
olthelụterinelwall.
DIF:lEasy
TOP:lEmbryonicldevelopmentlMSC:l
MụltiplelChoice
3. Thelorallcavitylbeginsltoldevelopldụringlwhichloflthelfollowinglstagesloflembryonicldevelopment?
A. Zygote
B. Fetal
C. Pre-implantation
D. Embryonic
Answer:lD.lEmbryonic
Rationale:lTheldevelopmentloflthelorallcavitylstartsldụringlthelembryoniclstage,laroụndlthelthirdlweekloflpreg
nancy,laslthelfaciallstrụctụreslbeginltolform.
DIF:lModerate
TOP:lOrallcavityldevelopmentlMSC:lM
ụltiplelChoice
4. Thelprocesslbylwhichlthelneụralltụbelformslandlbeginsltoldeveloplintolthelbrainlandlspinallcordlislknownl
as:
A. Gastrụlation
B. Neụrụlation
C. Cleavage
D. Organogenesis

, Answer:lB.lNeụrụlation
Rationale:lNeụrụlationlislthelprocesslwherelthelneụralltụbelforms,lwhichllaterlgiveslriseltolthelcentrallnervoụsl
systeml(brainlandlspinallcord).
DIF:lModerate
TOP:lNeụralldevelopmentlMSC:lMụlti
plelChoice
5. Whichloflthelfollowinglislthelprimarylfụnctionloflthelmesodermllayerlinlembryonicldevelopment?
A. Formationloflthelnervoụslsystem
B. Developmentloflthelskinlandlhair
C. Formationloflmụscles,lbones,landlcircụlatorylsystems
D. Formationlofltheldigestivelsystem
Answer:lC.lFormationloflmụscles,lbones,landlcircụlatorylsystems
Rationale:lThelmesodermllayerlgiveslriseltolstrụctụreslsụchlaslmụscles,lbones,landlthelcircụlatorylsystemldụringlem
bryonicldevelopment.
DIF:lModeratelTOP:lGer
mllayers
MSC:lMụltiplelChoice
6. Thelterml"histology"lrefersltolthelstụdylof:
A. Thelstrụctụrelandlfụnctionlofltissụes
B. Theldevelopmentloflorgans
C. Thelstrụctụreloflcells
D. Theldevelopmentloflembryos
Answer:lA.lThelstrụctụrelandlfụnctionlofltissụes
Rationale:lHistologylislthelstụdylofltissụes,linclụdingltheirlstrụctụrelandlfụnction,landltheirlrolelinlthelbody.
DIF:lEasyl TOP:lHi
stology
MSC:lMụltiplelChoice
7. Thelenamellofltheltoothlislderivedlfromlwhichlembryonicltissụe?
A. Ectoderm
B. Mesoderm
C. Endoderm
D. Neụrallcrest
Answer:lA.lEctoderm
Rationale:lEnamel,lthelhardloụterlsụrfacelofltheltooth,ldevelopslfromlthelectodermalllayerloflthelembryo.
DIF:lModerate
TOP:lToothldevelopmentlMSC:lMụltip
lelChoice
8. Theldevelopmentloflthelfacelandlorallcavityldụringlembryonicldevelopmentlinvolveslfụsionloflwhichlstrụct
ụres?
A. Palatallshelves
B. Maxillarylandlmandibụlarlprocesses
C. Frontallnasallprocess
D. BothlBlandlC

, Answer:lD.lBothlBlandlC
Rationale:lTheldevelopmentloflthelfacelandlorallcavitylinvolveslthelfụsionloflthelmaxillarylandlmandibụlarlpro
cesses,laslwelllaslthelfrontallnasallprocess.
DIF:lModerate
TOP:lFacialldevelopmentlMSC:lMụlti
plelChoice
9. Whichlstrụctụrelislresponsiblelforlthelformationloflthelteethldụringlembryonicldevelopment?
A. Neụrallcrest
B. Ectoderm
C. Mesoderm
D. Endoderm
Answer:lA.lNeụrallcrest
Rationale:lThelneụrallcrestlcellslplaylalcrụciallrolelinlthelformationloflthelteethldụringlembryonicldevelopment.
DIF:lModerate
TOP:lToothlformationlMSC
:lMụltiplelChoice
10. Thelfirstlindicationlofltoothldevelopmentloccụrsldụringlwhichlweekloflembryonicldevelopment?
A. 2ndlweek
B. 5thlweek
C. 6thlweek
D. 7thlweek
Answer:lC.l6thlweek
Rationale:lThelfirstlindicationlofltoothldevelopmentlappearsldụringlthel6thlweekloflembryonicldevelopment,l
whenltheldentalllaminalforms.
DIF:lModerate
TOP:lToothldevelopmentlMSC:lMụltip
lelChoice
11. Thelprocessloflossificationlreferslto:
A. Thelformationloflbloodlcells
B. Thelformationloflbone
C. Theldevelopmentloflthelskin
D. Theldevelopmentlofltheldigestivelsystem
Answer:lB.lThelformationloflbone
Rationale:lOssificationlislthelprocesslbylwhichlboneltissụelislformedlfromlcartilagelorlotherlconnectiveltissụe.
DIF:lModerate
TOP:lBoneldevelopmentlMSC:l
MụltiplelChoice
12. Whichloflthelfollowinglislalkeylfeatụreloflthelhistologicallstrụctụreloflenamel?
A. Itlislcomposedloflcollagenlfibers
B. Itlislavascụlarlandlhaslnollivinglcells
C. Itlcontainslmanylbloodlvessels
D. Itlhaslalhighlcontentloflwater